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Artist 52 [7]
2 years ago
5

What are the four criteria for minerals?

Biology
1 answer:
Leona [35]2 years ago
8 0

Answer:

color, streak, hardness, luster, diaphaneity, specific gravity, cleavage, fracture, magnetism, solubility

Explanation:

These physical properties are useful for identifying minerals. However, they are much more important in determining the potential industrial uses of the mineral.

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Imagine that zika virus has a 1% incidence in the population. A test for the virus has a 3% false positive rate and no false neg
Darina [25.2K]

Answer:

The answer is 97%.

Explanation:

The zika virus' 1% incidence rate in the population has no effect over the probability of the patient being infected or not. If the test has a 3% false positive rate that means that if it is positive, the results have a 97% chance of being true. Therefore the chance that the person who took the test and had a positive result being actually infected is 97%.

I hope this answer helps.

5 0
2 years ago
Read 2 more answers
A small child gives a plastic frog a big push at the bottom of a slippery 2.0 meter long, 1.0 meter high ramp, starting it with
lesya692 [45]
First, let's find the angle of inclination using the tangent function.

sin θ = opposite/hypotenuse = 1 m/2 m
θ = 30°

Assuming the ramp is frictionless, the force balance is:
F = mgsinθ = ma
Cancelling out m,
a = gsinθ = (9.81 m/s²)(sin 30°) = 4.905 m/s²

Using the equation for rectilinear motion at constant acceleration,
x = v₀t + 0.5at²
2 m = (6 m/s)(t) + 0.5(4.905 m/s²)(t²)
Solving for tm
t = 0.297 seconds

Using the equation for acceleration:
a = (v - v₀)/t
4.905 m/s² = (v - 6 m/s)/0.297 s
Solving for v,
v = 7.46 m/s
8 0
3 years ago
20 points each and brainliest!! I NEED HELP!
8_murik_8 [283]

YOU HAVE TWO LOOK AT BOTH

5 0
3 years ago
16. Which of the following substances are elements (check all that apply)?
MA_775_DIABLO [31]

Answer:

hydrogen,calcium,air

7 0
2 years ago
Which of the following characteristics of science is BEST seen in the development of the cellular theory
Sergio039 [100]
The three characteristics of the cellular theory are:

all cells came from other cells

all living things are made of cell

the basic unit of structure and function is a cell

lol, that's what we're learning in science.
8 0
3 years ago
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